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830 
AXNT20 KNHC 231059
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT THU OCT 23 2014

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL  
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF 
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE 
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE 
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL 
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1015 UTC.

...TROPICAL WAVES...

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 25W/26W FROM 13N 
SOUTHWARD...MOVING WESTWARD 10 TO 15 KNOTS. CONVECTIVE 
PRECIPITATION...SCATTERED TO NUMEROUS FROM 3N TO 7N BETWEEN 22W 
AND 28W. 

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 40W FROM 14N SOUTHWARD. 
THE WAVE IS MOVING WESTWARD 15 KNOTS. CONVECTIVE 
PRECIPITATION...SCATTERED MODERATE TO ISOLATED STRONG FROM 4N TO 
11N BETWEEN 36W AND 38W. 

A TROPICAL WAVE EXTENDS FROM 17N59W IN THE ATLANTIC OCEAN...TO 
12N61W...TO 7N62W IN EASTERN VENEZUELA. THE WAVE IS MOVING 
WESTWARD 10 TO 15 KNOTS. CONVECTIVE PRECIPITATION...NUMEROUS 
STRONG FROM 12N TO 13N BETWEEN 58W AND 61W. WIDELY SCATTERED 
MODERATE TO ISOLATED STRONG ELSEWHERE FROM 9N TO 17N BETWEEN 58W 
AND 62W.
 
...THE ITCZ/THE MONSOON TROUGH...                                
 
THE MONSOON TROUGH PASSES THROUGH THE COASTAL BORDER SECTIONS OF 
GUINEA AND GUINEA-BISSAU NEAR 11N15W TO 10N16W AND 9N19W. THE 
ITCZ CONTINUES FROM 9N19W TO 8N25W 6N34W 6N40W AND 4N45W.  
CONVECTIVE PRECIPITATION...SCATTERED STRONG FROM 7N TO 12N 
BETWEEN 28W AND 33W. WIDELY SCATTERED MODERATE TO ISOLATED 
STRONG FROM 4N TO 10N BETWEEN 40W AND 50W. WIDELY SCATTERED 
MODERATE TO ISOLATED STRONG ELSEWHERE FROM 14N SOUTHWARD BETWEEN 
20W AND 50W. 

...DISCUSSION...

FROM THE WESTERN ATLANTIC OCEAN...CROSSING FLORIDA...INTO THE 
GULF OF MEXICO...INCLUDING THE REST OF THE GULF OF MEXICO...

A MIDDLE LEVEL TO UPPER LEVEL CYCLONIC CIRCULATION CENTER IS 
ALONG THE U.S.A EAST COAST NEAR 40N72W. A TROUGH EXTENDS FROM 
THAT CYCLONIC CENTER THROUGH 32N73W TO 30N74W. CYCLONIC WIND 
FLOW COVERS THE ATLANTIC OCEAN FROM 29N NORTHWARD BETWEEN 63W 
AND THE U.S.A. EAST COAST. THIS PART OF THE TROUGH HAS BROKEN 
AWAY FROM THE REST OF THE TROUGH WHICH STARTS IN FLORIDA. A 
MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH FLORIDA NEAR 
30N82W...INTO THE SOUTHEASTERN CORNER OF THE GULF OF MEXICO... 
TO THE NORTHWESTERN CORNER OF THE YUCATAN PENINSULA...INTO THE 
SOUTHWESTERN CORNER OF THE GULF OF MEXICO. COMPARATIVELY DRIER 
AIR IN SUBSIDENCE...AS SEEN IN WATER VAPOR IMAGERY...COVERS THE 
AREA TO THE WEST AND NORTHWEST OF THE LINE THAT PASSES THROUGH 
32N70W 30N80W 25N86W 21N90W 21N96W. BROKEN TO OVERCAST 
MULTILAYERED CLOUDS AND RAINSHOWERS ARE TO THE EAST AND 
SOUTHEAST OF THE SAME LINE. THE CLOUDINESS AND PRECIPITATION ARE 
PART OF THE RIDGE AND MOISTURE STREAM THAT ORIGINATE IN THE 
ATLANTIC OCEAN NEAR 32N56W AND THAT REACH NORTHERN COASTAL 
HONDURAS. A COLD FRONT PASSES THROUGH 32N68W IN THE ATLANTIC 
OCEAN...TO 28N75W...TO FLORIDA JUST TO THE SOUTH OF LAKE 
OKEECHOBEE...TO 26N86W. A STATIONARY FRONT REMAINS FROM 26N86W 
TO 25N95W. 

TROPICAL DEPRESSION NINE MOVED INLAND IN MEXICO BETWEEN CAMPECHE 
AND CIUDAD DEL CARMEN JUST AFTER 23/0000 UTC. THE DEPRESSION WAS 
DECLARED TO BE A REMNANT LOW AFTER LANDFALL. THE 1004 MB LOW 
PRESSURE CENTER IS IN MEXICO NEAR 19N90.5W. CONVECTIVE 
PRECIPITATION...NUMEROUS STRONG FROM 19N TO 21N BETWEEN 85W AND 
87W OFF THE COAST OF THE YUCATAN PENINSULA IN THE NORTHWESTERN 
CARIBBEAN SEA. 

FOR THE OFFSHORE OIL PLATFORM SITES THAT ARE TO THE NORTH OF 27N 
TO THE WEST OF 88W...LOW CLOUD CEILING REPORTS...

LOW LEVEL CLOUD CEILINGS ARE BEING REPORTED AT...KOPM... 
KMZG...KGVX...KXIH...KEMK...KHQI...KVQT...KSPR...KIKT...
KGBK...KGRY...KMDJ...KIPN...AND KVOA. 

LOW CLOUD CEILINGS AND WEATHER...FOR THE COASTAL PLAINS OF THE 
U.S.A. FROM THE DEEP SOUTH OF TEXAS TO FLORIDA...

LOW LEVEL CLOUD CEILINGS ARE BEING REPORTED IN ST. PETERSBURG 
AND NAPLES IN FLORIDA. LIGHT RAIN IS BEING REPORTED AT THE NAVAL 
AIR STATION IN KEY WEST FLORIDA.

...FROM THE WESTERN ATLANTIC OCEAN...ACROSS THE GREATER 
ANTILLES...THROUGH THE NORTHWESTERN CORNER OF THE CARIBBEAN 
SEA...BEYOND HONDURAS...

MIDDLE LEVEL TO UPPER LEVEL ANTICYCLONIC WIND FLOW SPANS THE 
EASTERN GULF OF MEXICO...THE NORTHWESTERN CORNER OF THE 
CARIBBEAN SEA...AND THE ATLANTIC OCEAN TO THE WEST OF 54W. A 
RIDGE PASSES THROUGH 32N56W IN THE ATLANTIC OCEAN...TO 
26N64W...TO THE TURKS AND CAICOS ISLANDS...BEYOND NORTHERN 
COASTAL HONDURAS. MULTILAYERED CLOUDS ARE WITHIN 240 NM TO 360 
NM ON EITHER SIDE OF THE LINE THAT PASSES THROUGH 32N63W 27N70W 
23N81W...BEYOND THE GULF OF HONDURAS. CONVECTIVE 
PRECIPITATION...NUMEROUS STRONG FROM 17N TO 23N BETWEEN 77W AND 
82W...COVERING PARTS OF SOUTHERN COASTAL JAMAICA...AND FROM CUBA 
SOUTHWARD. NUMEROUS STRONG ALSO IN THE AREA OF THE GULF OF 
HONDURAS/BELIZE/HONDURAS...WITHIN A 30 NM RADIUS OF 16N88.5W. 
SCATTERED MODERATE TO ISOLATED STRONG ELSEWHERE FROM 17N TO 25N 
BETWEEN 72W AND 87W.
 
...THE REST OF THE CARIBBEAN SEA...

UPPER LEVEL SOUTHWESTERLY WIND FLOW COVERS THE REST OF THE 
CARIBBEAN SEA...AWAY FROM THE ANTICYCLONIC WIND FLOW THAT 
DOMINATES THE ATLANTIC OCEAN AND THE NORTHWESTERN CORNER OF THE 
CARIBBEAN SEA. 

THE MONSOON TROUGH IS ALONG 8N74W IN COLOMBIA...TO 8N80W... 
WESTWARD THROUGH PANAMA...NORTHWESTWARD THROUGH COSTA RICA... 
NICARAGUA...EL SALVADOR...AND BEYOND SOUTHERN GUATEMALA INTO THE 
EASTERN PACIFIC OCEAN. CONVECTIVE PRECIPITATION...RAINSHOWERS 
ARE POSSIBLE FROM 13N SOUTHWARD FROM 75W WESTWARD IN THE 
SOUTHWESTERN CORNER OF THE CARIBBEAN SEA.

...HISPANIOLA...

UPPER LEVEL NORTH-TO-NORTHEASTERLY WIND FLOW IS PASSING ON TOP 
OF HISPANIOLA AT THIS TIME. THIS WIND FLOW IS ON THE EASTERN/ 
SOUTHEASTERN SIDE OF THE HONDURAS-TO-ATLANTIC OCEAN MIDDLE LEVEL 
TO UPPER LEVEL RIDGE. COMPARATIVELY DRIER AIR IN SUBSIDENCE 
STILL COVERS HISPANIOLA. 

CLOUD CONDITIONS/PREVAILING WEATHER FOR THE DOMINICAN 
REPUBLIC...FEW LOW LEVEL AND SCATTERED HIGH LEVEL CLOUDS ARE 
BEING REPORTED AT OBSERVING SITES THAT ARE AROUND THE ISLAND.
 
THE GFS MODEL FORECAST FOR 250 MB SHOWS THAT NORTHERLY WIND FLOW 
WILL CROSS HISPANIOLA FOR THE NEXT 48 HOURS...WITH THE CURRENT 
RIDGE REMAINING IN PLACE. THE GFS MODEL FOR 500 MB SHOWS THAT 
LARGE SCALE ANTICYCLONIC WIND FLOW WILL COVER HISPANIOLA. AN 
ELONGATED NORTHEAST-TO-SOUTHWEST ORIENTED ATLANTIC OCEAN-TO-
CARIBBEAN SEA RIDGE EVENTUALLY WILL PASS ON TOP OF HISPANIOLA.  
THE GFS MODEL FORECAST FOR 700 MB SHOWS THAT SOUTHEAST WIND FLOW 
WILL CROSS HISPANIOLA...WITH AN ATLANTIC OCEAN-TO-CARIBBEAN SEA 
RIDGE. 

...THE REST OF THE ATLANTIC OCEAN... 

A MIDDLE LEVEL TO UPPER LEVEL CYCLONIC CIRCULATION CENTER IS 
NEAR 22N50W. CYCLONIC WIND FLOW COVERS THE ATLANTIC OCEAN FROM 
17N TO 26N BETWEEN 45W AND 60W. A 1012 MB LOW PRESSURE CENTER IS 
NEAR 28N55W. A SURFACE TROUGH EXTENDS FROM 32N55W...TO THE 1012 
MB LOW CENTER...TO 24N56W. CONVECTIVE PRECIPITATION...WIDELY 
SCATTERED TO SCATTERED MODERATE AND ISOLATED STRONG FROM 22N TO 
30N BETWEEN 48W AND 54W. ISOLATED MODERATE FROM 20N TO 23N 
BETWEEN 40W AND 48W. 

A MIDDLE LEVEL TO UPPER LEVEL CYCLONIC CIRCULATION CENTER IS 
NEAR 35N30W. A TROUGH EXTENDS FROM 35N30W TO 29N28W...TO 23N31W 
17N34W...AND TO 13N38W. A SURFACE TROUGH PASSES THROUGH 32N30W 
TO 29N32W AND 25N35W. CONVECTIVE PRECIPITATION...SCATTERED 
MODERATE TO ISOLATED STRONG FROM 28N NORTHWARD BETWEEN 22W AND 
30W.  
 
FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
MT




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